Question

$P+Q$ means $P$ is the brother of $Q$;

$P-Q$ means $P$ is the mother of $Q$ and

$P\ast Q$ means $P$ is the sister of $Q$.

Which of the following means $M$ is the maternal uncle of $R$ ?

• A. $M+K+R$
• B. $M-R+K$
• C. $M+K-R$
• D. $M+K\ast R$
• E. None of these

Answer 1

The correct option is C $M+K-R$

Option A: $M+K+R$ means that M, K and R are brothers

Option B: $M-R+K$ means M is the mother of brothers R and K.

Option C: $M+K-R$ means M is the brother of K and K is the mother of R.

Hence, M is the maternal uncle of R.

Option D: $M+K\ast R$ means M is the brother of K and K is the sister of R.

Hence, M, K and R are siblings.